🔢開発
進数変換器
Convert integers between bases 2 through 64, including binary, octal, decimal, hex, Base58, and Base64. Uses BigInt for unlimited precision. Shows formatted output with nibble/byte spacing.
Valid digits: 0–9
② Enter a number
= Decimal 255
③ Results
Binary (Base 2)
1111 1111
11111111
Octal (Base 8)
377
Decimal (Base 10)← input
255
Hexadecimal (Base 16)
ff
Base 31 (Base 31)
Excluded letters: A, E, I, O, U
87
Base 32 (Base 32)
Excluded letters: I, O, Q, U
7z
Base 34 (Base 34)
Excluded letters: I, O
7h
Base 36 (Base 36)
73
Examples:
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How it works
This 進数変換器 runs entirely in your browser — no data is sent to any server. Simply fill in the fields above and the result updates instantly. You can copy the output with the copy button provided.